package com.xuecheng.manage_course.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;
import org.springframework.security.oauth2.config.annotation.web.configuration.ResourceServerConfigurerAdapter;
import org.springframework.security.oauth2.provider.token.TokenStore;
import org.springframework.security.oauth2.provider.token.store.JwtAccessTokenConverter;
import org.springframework.security.oauth2.provider.token.store.JwtTokenStore;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.stream.Collectors;
/**
 * @author: gongfy
 * @create: 2020/8/25 10:21
 * @Description: 认证授权配置类
 */
@Configuration
@EnableResourceServer  // 是为OAuth2资源服务器提供方便的注释，启用Spring Security 过滤器，通过传入的OAuth2令牌对请求进行身份验证
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)//激活方法上的PreAuthorize注解,用于网关zuul过滤使用
public class ResourceServerConfig extends ResourceServerConfigurerAdapter {

    //公钥
    private static final String PUBLIC_KEY = "publickey.txt";

    //定义JwtTokenStore，使用jwt令牌
    @Bean
    public TokenStore tokenStore(JwtAccessTokenConverter jwtAccessTokenConverter) {
        return new JwtTokenStore(jwtAccessTokenConverter);
    }
    //定义JwtAccessTokenConverter，使用jwt令牌
    @Bean
    public JwtAccessTokenConverter jwtAccessTokenConverter() {
        JwtAccessTokenConverter converter = new JwtAccessTokenConverter();
        converter.setVerifierKey(getPubKey());
        return converter;
    }
    /**
     * 获取非对称加密公钥 Key
     * @return 公钥 Key
     */
    private String getPubKey() {
        Resource resource = new ClassPathResource(PUBLIC_KEY);
        try {
            InputStreamReader inputStreamReader = new InputStreamReader(resource.getInputStream());
            BufferedReader br = new BufferedReader(inputStreamReader);
            return br.lines().collect(Collectors.joining("\n"));
        } catch (IOException ioe) {
            return null;
        }
    }
    //Http安全配置，对每个到达系统的http请求链接进行校验  //下边的路径放行
    @Override
    public void configure(HttpSecurity http) throws Exception {
        //所有请求必须认证通过
        http.authorizeRequests().
                //下边的路径放行      给里面加，/**所有资源都不进行令牌校验
                antMatchers("/v2/api-docs","/swagger-resources/configuration/ui",
                                        "/swagger-resources","/swagger-resources/configuration/security",
                                        "/swagger-ui.html","/webjars/**","/course/teachplan/list/**").permitAll().anyRequest().authenticated();
    }
}
